Nonvolatile memory including intermediate buffer and input/output buffer and memory system including the nonvolatile memory

A memory system comprising:

• a nonvolatile memory including a memory cell array, an input/output buffer, and one or more intermediate buffers each electrically connected between the memory cell array and the input/output buffer, the memory cell array including a plurality of pages, the plurality of pages including at least a first page and a second page, the second page being different from the first page, the one or more intermediate buffers including at least a first intermediate buffer;
• and
• a controller electrically connected to the nonvolatile memory and configured to:
• by transmitting, to the nonvolatile memory, a first command sequence that includes a first sensing operation instruction, designation of the first page, and designation of the first intermediate buffer, instruct the nonvolatile memory to store first data read through a sensing operation from the first page into the first intermediate buffer;
• by transmitting, to the nonvolatile memory, a second command sequence that includes a second sensing operation instruction, designation of the second page, but does not include designation of any of the intermediate buffers, instruct the nonvolatile memory to store second data read through a sensing operation from the second page into the input/output buffer;
• and
• by transmitting, to the nonvolatile memory, a third command sequence that includes an output instruction, instruct the nonvolatile memory to output data from the input/output buffer.